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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Linux System Administrator - **Company:** The Johns Hopkins University Applied Physics Laboratory LLC - **Location:** North Laurel, MD, United States - **Experience:** Expert - **Salary:** $100,000.0 - $245,000.0 - **Contract:** Contract - **Skills:** Microsoft Windows, Business Analytics Applications, Ubuntu (Operating System), Cyber Security, Computer Programming, Linux, Hardware-In-The-Loop Simulation, Interoperability, MATLAB, Rhel5, Scripting, Computer Networking Systems, System Availability, Computerised Systems, Gitlab, Information Technology, Rhel6, Legacy Systems - **Published:** June 26, 2026 - **Apply:** https://diversityjobs.com/career/15153279/Linux-System-Administrator-Maryland-Laurel ## About the Role Are you passionate about shaping secure, IT systems in classified environments? Do you want to influence system improvements, implementation decisions, and the overall security posture of advanced technology systems?, * Have a Bachelor's degree in Computer Science, Information Technology, or related field, or have equivalent experience. * Possess 7+ years of professional experience as a Linux systems administrator in secure or complex environments. * Are a strong teammate with a focus on exchanging information and collaboration. * Are proficient in various operating systems, including some of the following: Linux operating systems (RHEL5, RHEL6, RHEL7, RHEL8, RHEL9, Ubuntu), Real-time Linux computing systems (Concurrent platforms) * Have knowledge of interoperability between Linux and Windows systems. * Have experience administering systems in classified environments, with an understanding of secure operations, auditing, and following compliance frameworks (RMF, NIST, etc.) * Have excellent written and verbal communication skills with the ability to collaborate across engineering, program, and security teams. * Are proactive, self-motivated, and comfortable owning technical decisions. * Have some experience with programming/scripting languages. * Hold a current DoD 8570 certification (Security+, CASP, CISSP) or have the ability to obtain one within 6 months of employment. * Hold an Interim Secret level security clearance and can ultimately obtain a Top-Secret level clearance. If selected, you will be subject to a government security clearance investigation and must meet the requirements for access to classified information. Eligibility requirements include U.S. citizenship. ## Description We are seeking a Linux System Administrator to join the RF Engineering group to support Hardware-in-the-Loop (HiL) facilities. In this role, you will apply Risk Management Framework (RMF) principles, develop new IT security capabilities, and provide advanced system administration across complex, classified infrastructures, helping drive innovation, security, and operational excellence. This role combines technical execution, collaborating with a team of system administrators, and establishing Linux standards. As a Linux system administrator, you will recommend and implement changes that align with security protocols, the overall mission, and engineering team capabilities., * Plan, deploy, maintain, and upgrade computing and networking infrastructure supporting HiL operations. Specifically, via system administration of Linux-based HiL computer systems, including legacy platforms , modern platforms , and real-time computing systems. * Design, implement, and enforce system security hardening standards (STIG) in accordance with established compliance frameworks (RMF, NIST, etc.) * Support installation and management of engineering, scientific, and analysis applications in secure, classified environments such as GitLab and MATLAB. * Solve complex technical issues that impact system availability, performance, or security. * Integrate Linux systems with Windows platforms to support hybrid workflows in RF and simulation environments. * Manage a lab/test environment to validate new applications, configurations, and upgrades before deployment to production systems. * Collaborate with engineers, cybersecurity staff, and program managers to ensure mission success. ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [The best of two worlds - Bringing enterprise-grade Linux to the vehicle](https://www.wearedevelopers.com/videos/67-the-best-of-two-worlds-bringing-enterprise-grade-linux-to-the-vehicle) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [You can’t hack what you can’t see](https://www.wearedevelopers.com/videos/41-you-can-t-hack-what-you-can-t-see) ## Related Articles - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Top 6 Hackathons for Developers in 2023](https://www.wearedevelopers.com/magazine/263-top-6-hackathons-for-developers-in-2023) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)